<template>
  <div id="app">
    <h2>测试题</h2>
    <subject v-for="(result, index) in list" :key="index" :index="index"
    @result="resultFn"
    ></subject>
    <div>
      <flag v-for="(result, index) in list" :key="index" :result="result" :index="index"></flag>
    </div>
  </div>
</template>

<script>
import Subject from './components/Subject'
import Flag from './components/Flag'
export default {
  data(){
    return {
      list: ["未完成", "未完成", "未完成", "未完成", "未完成"] // 保存的是题目做的结果: 值有3种情况 "未完成", "正确", "错误"
    }
  },
  methods: {
    resultFn(resultStr, index){ // "正确", "错误"
      this.$set(this.list, index, resultStr); // 把结果更新到list数组中
    }
  },
  components: {
    Subject,
    Flag
  }
};
</script>

<style>
body {
  background-color: #eee;
}

#app {
  background-color: #fff;
  width: 500px;
  margin: 50px auto;
  box-shadow: 3px 3px 3px rgba(0, 0, 0, 0.5);
  padding: 2em;
}
</style>